CN113687034B - Humidity sensor's testing arrangement - Google Patents
Humidity sensor's testing arrangementInfo
- Publication number
- CN113687034B CN113687034B CN202111131775.9A CN202111131775A CN113687034B CN 113687034 B CN113687034 B CN 113687034B CN 202111131775 A CN202111131775 A CN 202111131775A CN 113687034 B CN113687034 B CN 113687034B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
本发明提供了一种湿度传感器的测试装置，属于传感器测试的技术领域，解决了在对湿度传感器各湿度点的响应时间进行测试时，存在测量困难的技术问题。一种湿度传感器的测试装置，包括湿度测试外壳体、时间常数测试腔、隔板、湿度传感器和释放机构；隔板设置在湿度测试外壳体的内腔中，湿度测试外壳体下部与隔板之间形成有湿度发生器测试腔；湿度传感器设置于时间常数测试腔内，时间常数测试腔位于湿度发生器测试腔内，时间常数测试腔的上表面抵靠在隔板的底面，使得时间常数测试腔形成密闭空间；快速释放机构包括固定部件和释放部件，释放部件与固定部件活动连接。
This invention provides a testing device for a humidity sensor, belonging to the technical field of sensor testing, and solves the technical problem of measurement difficulties when testing the response time of humidity sensors at various humidity points. The testing device for a humidity sensor includes a humidity testing housing, a time constant testing chamber, a partition, a humidity sensor, and a release mechanism. The partition is disposed within the inner cavity of the humidity testing housing, and a humidity generator testing chamber is formed between the lower part of the humidity testing housing and the partition. The humidity sensor is disposed within the time constant testing chamber, which is located within the humidity generator testing chamber. The upper surface of the time constant testing chamber abuts against the bottom surface of the partition, thus forming a sealed space within the time constant testing chamber. The quick release mechanism includes a fixing component and a release component, with the release component movably connected to the fixing component.
Description
Technical Field
The invention relates to the technical field of sensor testing, in particular to a testing device of a humidity sensor.
Background
Along with the development of technology, the humidity sensor has a wider and wider application range. Humidity sensor is in the stage of production development, needs to carry out the test of response time of each humidity point in a certain temperature range.
Currently, when the response time of each humidity point of a humidity sensor is tested, the measurement is difficult.
Disclosure of Invention
The invention aims to provide a testing device of a humidity sensor, which is used for solving the technical problem that measurement is difficult when response time of each humidity point of the humidity sensor is tested.
In a first aspect, the invention provides a testing device for a humidity sensor, which comprises a humidity testing outer shell, a time constant testing cavity, a baffle plate, the humidity sensor and a quick release mechanism;
the partition board is arranged in the inner cavity of the humidity testing outer shell, and a humidity generator testing cavity is formed between the lower part of the humidity testing outer shell and the partition board;
The humidity sensor is arranged in the time constant test cavity, the time constant test cavity is positioned in the humidity generator test cavity, and the upper surface of the time constant test cavity is abutted against the bottom surface of the partition plate, so that the time constant test cavity forms a closed space;
The quick release mechanism comprises a fixed part and a release part, and the release part is movably connected with the fixed part;
The fixed part of quick release mechanism with humidity test shell body phase is fixed, quick release mechanism's release part with time constant test cavity phase is fixed, release part can release and whereabouts from fixed part for time constant test cavity breaks away from with the baffle, humidity transducer in the time constant test cavity with humidity generator test cavity fully contacts.
Further, the release member includes a release lever, a cross member, and a trigger assembly;
The top of the release rod is fixed with the cross beam through a nut, and the bottom of the release rod is fixed with the time constant testing cavity;
The trigger assembly is disposed on the fixed member and is configured to raise the cross beam such that the cross beam remains relatively stationary with respect to the fixed member.
Further, the release lever includes a first release lever and a second release lever;
the first release rod and the second release rod are respectively fixed at two ends of the cross beam through nuts.
Further, the trigger assembly includes a trigger and a button;
the button is connected with the fixed part through a spring, and a control groove for controlling the trigger is arranged on the button;
The middle part of the trigger is connected with the fixed part through a rotating shaft, one end of the trigger is positioned in the control groove, and the other end of the trigger is provided with a release hook for supporting the cross beam;
The button is pressed to enable the control groove to drive one end of the trigger to rotate around the rotating shaft, and the release hook at the other end of the trigger is contracted to release the cross beam;
One end of the trigger is driven by the control groove to rotate around the rotating shaft by releasing the button, and the release hook at the other end of the trigger is sprung outwards to erect the cross beam.
Further, the fixed component comprises a central rod and a control head;
the bottom end of the central rod is fixed with the partition plate, and the control head is fixed at the top end of the central rod;
the control head is provided with a button groove, and the button is positioned in the button groove;
The trigger is positioned in the trigger groove, and the release hook can be sprung or contracted outside the opening.
Further, a through hole is formed in the cross beam, and the center rod penetrates through the through hole.
Further, a heat preservation layer is arranged on the partition board.
Further, the upper surface of heat preservation is provided with the blotter.
Further, the heat preservation layer is made of polytetrafluoroethylene materials.
Furthermore, the time constant test cavity is a cavity structure with an upper opening,
The upper opening of the time constant test cavity is provided with a sealing ring which is made of silicon rubber.
The invention provides a testing device of a humidity sensor, which comprises a humidity testing outer shell, a time constant testing cavity, a partition board, the humidity sensor and a release mechanism, wherein the partition board is arranged in an inner cavity of the humidity testing outer shell, a humidity generator testing cavity is formed between the lower part of the humidity testing outer shell and the partition board, the humidity sensor is arranged in the time constant testing cavity, the time constant testing cavity is positioned in the humidity generator testing cavity, the upper surface of the time constant testing cavity is abutted against the bottom surface of the partition board, so that the time constant testing cavity forms a closed space, the release mechanism comprises a fixing part and a release part, the release part is movably connected with the fixing part, the fixing part of the quick release mechanism is fixed with the humidity testing outer shell, the release part of the quick release mechanism is fixed with the time constant testing cavity, and the release part can be released from the fixing part and fall down, so that the time constant testing cavity is separated from the partition board, and the humidity sensor in the time constant testing cavity is fully contacted with the humidity generator testing cavity.
The upper surface of the time constant testing cavity is tightly abutted against the bottom surface of the partition board by the release mechanism, so that the humidity sensor is positioned in a closed space formed by the partition board and the time constant testing cavity, the release component on the release mechanism can be released from the fixed component and falls down, so that the time constant testing cavity on the release component is driven to be separated from the partition board, the humidity sensor in the time constant testing cavity is fully contacted with the humidity generator testing cavity, namely, the humidity sensor rapidly enters the humidity generator testing cavity from the time constant testing cavity, a step signal of humidity is generated, and the time constant of the humidity sensor is recorded by collecting the humidity value of the humidity sensor. The humidity in the humidity generator test cavity is controlled by the double-pressure humidity generator, the humidity generator test cavity with known humidity and the humidity sensor with known time constant are adopted for verification, the measured time constant of the humidity sensor is compared with the factory time constant of the humidity sensor, and the time constant test conversion time requirement is satisfied, so that the response time of each humidity point of the humidity sensor is conveniently tested.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a humidity sensor testing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a humidity sensor before releasing a testing device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a humidity sensor after releasing a testing device according to an embodiment of the present invention;
FIG. 4 is a graph of a unit step response of a first order system in accordance with an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "comprising" and "having" and any variations thereof, as used in the embodiments of the present invention, are intended to cover non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may optionally include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Along with the development of technology, the humidity sensor has a wider and wider application range. Humidity sensor is in the stage of production development, needs to carry out the test of response time of each humidity point in a certain temperature range.
Currently, when the response time of each humidity point of a humidity sensor is tested, the measurement is difficult.
In order to solve the above problems, the present invention provides a testing device for a humidity sensor.
As shown in fig. 1 and 2, the testing device for the humidity sensor provided by the embodiment of the invention comprises a humidity testing outer shell 1, a time constant testing cavity 2, a partition board 3, a humidity sensor (not shown in the figure) and a quick release mechanism 5, wherein the partition board 3 is arranged in the inner cavity of the humidity testing outer shell 1, a humidity generator testing cavity 4 is formed between the lower part of the humidity testing outer shell 1 and the partition board 3, the humidity sensor is arranged in the time constant testing cavity 2, the time constant testing cavity 2 is positioned in the humidity generator testing cavity 4, the upper surface of the time constant testing cavity 2 abuts against the bottom surface of the partition board 3, so that the time constant testing cavity 2 forms a closed space, the quick release mechanism 5 comprises a fixing part 51 and a release part 52, the release part 52 is movably connected with the fixing part 51, the fixing part 51 of the quick release mechanism 5 is fixed with the humidity testing outer shell 1, and the release part 52 of the quick release mechanism 5 is fixed with the time constant testing cavity 2, and the release part 52 can be released from the fixing part 51 and fall down, so that the time constant testing cavity 2 is separated from the partition board 3, and the time constant testing cavity 2 is fully contacted with the humidity generator testing cavity 4 in the time constant testing cavity 2.
According to the testing device for the humidity sensor, the upper surface of the time constant testing cavity 2 is tightly abutted against the bottom surface of the partition board 3 by the release mechanism 5, so that the humidity sensor is located in a closed space formed by the partition board 3 and the time constant testing cavity 2, the release component 52 on the release mechanism 5 can be released from the fixing component 51 and falls down, the time constant testing cavity 2 on the release component 52 is driven to be separated from the partition board 3, the humidity sensor in the time constant testing cavity 2 is fully contacted with the humidity generator testing cavity 4, namely, the humidity sensor rapidly enters the humidity generator testing cavity 4 from the time constant testing cavity 2, a step signal of humidity is generated, and the time constant of the humidity sensor is recorded by collecting the humidity value of the humidity sensor. The humidity in the humidity generator test cavity 4 is controlled by a double-pressure humidity generator, the humidity generator test cavity 4 with known humidity and the humidity sensor with known time constant are adopted for verification, the measured time constant of the humidity sensor is compared with the factory time constant of the humidity sensor, and the requirement of the conversion time of the time constant test is met, so that the response time of each humidity point of the humidity sensor is conveniently tested.
In one possible embodiment, the release member 52 comprises a release rod 521, a cross beam 522 and a trigger assembly 523, wherein the top of the release rod 521 is fixed with the cross beam 522 through a nut, the bottom of the release rod 521 is fixed with the time constant testing cavity 2, and the relative fixed positions of the cross beam 522 and the release rod 521 can be adjusted through the nut, so that the time constant testing cavity 2 at the bottom of the release rod 521 is kept pressed with the partition plate 3, and the purpose of forming a closed space between the time constant testing cavity 2 and the partition plate 3 is achieved. The trigger assembly 523 is disposed on the fixed member 51, the trigger assembly 523 is used for erecting the cross beam 522 through the release hook, so that the cross beam 522 and the fixed member 51 are kept relatively static, and the release rod 521 fixed with the cross beam 522 is used for keeping the time constant testing cavity 2 and the partition plate 3 in a pressed state.
In one possible embodiment, the release lever 521 includes a first release lever 521 and a second release lever 521 as shown in fig. 3, and the first release lever 521 and the second release lever 521 are fixed to both ends of the cross member 522 by nuts, respectively. Two release bars 521 are provided, and both release bars 521 simultaneously generate an upward traction force on the time constant test chamber 2, so that the time constant test chamber 2 maintains a good balance when pressed against the partition plate 3.
In one possible embodiment, the trigger assembly 523 comprises a trigger 2531 and a button 5232, the button 5232 is connected with the fixed part 51 through a spring 5233, a control groove for controlling the trigger 2531 is arranged on the button 5232, the middle part of the trigger 2531 is connected with the fixed part 51 through a rotating shaft, one end of the trigger 2531 is positioned in the control groove, a release hook for lifting the beam 522 is formed at the other end of the trigger 2531, the control groove is pressed by the button 5232 to drive one end of the trigger 2531 to rotate around the rotating shaft, the release hook at the other end of the trigger 2531 is contracted to release the beam 522, the control groove is pressed by the release button 5232 to drive one end of the trigger 2531 to rotate around the rotating shaft, and the release hook at the other end of the trigger 2531 is sprung out to lift the beam 522. By arranging the spring 5233 and the button 5232, the button 5232 drives the trigger 2531 to rotate when being pressed, the release hook is contracted, and after stopping pressing, the spring 5233 drives the button 5232 to reset, so that the trigger 2531 reversely rotates, the release hook flicks outwards, and the release and lifting of the time constant testing cavity 2 are completed.
In one possible embodiment, the fixing member 51 includes a central rod 511 and a control head 512, the bottom end of the central rod 511 is fixed to the partition 3, the control head 512 is fixed to the top end of the central rod 511, a button 5232 groove is formed in the control head 512, the button 5232 is located in the button 5232 groove, a trigger 2531 groove is formed in the central rod 511, an opening matched with a release hook is formed in the trigger 2531 groove, the trigger 2531 is located in the trigger 2531 groove, and the release hook can be sprung or contracted at the opening. The provision of the center rod 511 and the control head 512 for securing the trigger assembly 523, the provision of the trigger assembly 523 in the button 5232 slot of the control head 512 and the trigger 2531 slot of the center rod 511, improves the stability of the trigger assembly 523.
In one possible embodiment, the cross beam 522 is provided with a through hole (not shown in the figure), and the central rod 511 penetrates through the through hole, so that the stability of the cross beam 522 on the central rod 511 is improved, and the cross beam 522 is prevented from deviating and sliding accidentally.
In a possible embodiment, the insulating layer 6 is provided on the partition board 3, and the insulating layer 6 is provided to keep the temperature in the time constant test cavity 2 and the temperature in the humidity generator test cavity 4 relatively constant, so that the time constant test is required to be performed on the humidity sensor in the temperature range of-30 ℃ to 40 ℃, and therefore, the insulating layer 6 can ensure the relatively constant test temperature, and ensure the test effect.
In one possible embodiment, the upper surface of the insulating layer 6 is provided with a cushion (not shown in the figures) for cushioning the beam 522 and the release lever 521 after it falls.
In one possible implementation, the heat-insulating layer 6 is made of polytetrafluoroethylene material, and the polytetrafluoroethylene material has the characteristics of low temperature resistance and no moisture absorption, and is high in stability, so that the accuracy of test data is ensured.
In one possible implementation manner, the time constant testing cavity 2 is a cavity structure with an upper opening, and a sealing ring 7 is arranged at the upper opening of the time constant testing cavity 2, and the sealing ring 7 is made of silicone rubber. The silicon rubber is a good sealing material with high temperature resistance and low temperature resistance, the time constant testing cavity 2 and the partition plate 3 are tightly pressed through the silicon rubber sealing ring 7, and the partition plate 3 is made of stainless steel, so that the time constant testing cavity 2 forms a good sealing environment.
In one possible embodiment, the time constant testing chamber 2 can move up and down within a distance of about 30mm under the drive of the beam 522 and the release lever 521.
In one possible embodiment, since humidity is the first order system, the transfer function of the first order system is
The input of which is as follows: I.e.
The output of which is as follows:
Taking Law's inverse transformation to obtain:
wherein the method comprises the steps of For the output response of humidity, T is the time constant of humidity. The response graph is shown in fig. 4, the time required when the output response reaches 63.2% of the total amplitude is a time constant, and the time required for the conversion time meeting the time constant test is qualified, namely the output response reaches 63.2% of the total amplitude.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
It should be noted that the foregoing embodiments are merely illustrative embodiments of the present invention, and not restrictive, and the scope of the invention is not limited to the embodiments, and although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any modification, variation or substitution of some of the technical features of the embodiments may be easily contemplated and made by those skilled in the art within the scope of the present invention without departing from the spirit of the embodiments. Are intended to be encompassed within the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (7)
1. The testing device of the humidity sensor is characterized by comprising a humidity testing shell, a time constant testing cavity, a baffle plate, the humidity sensor and a quick release mechanism;
the partition board is arranged in the inner cavity of the humidity testing outer shell, and a humidity generator testing cavity is formed between the lower part of the humidity testing outer shell and the partition board;
The humidity sensor is arranged in the time constant test cavity, the time constant test cavity is positioned in the humidity generator test cavity, and the upper surface of the time constant test cavity is abutted against the bottom surface of the partition plate, so that the time constant test cavity forms a closed space;
The quick release mechanism comprises a fixed part and a release part, and the release part is movably connected with the fixed part;
the fixed part of the quick release mechanism is fixed with the humidity test shell, the release part of the quick release mechanism is fixed with the time constant test cavity, and the release part can be released from the fixed part and falls down, so that the time constant test cavity is separated from the partition plate, and the humidity sensor in the time constant test cavity is fully contacted with the humidity generator test cavity; the release member comprises a release lever, a cross beam and a trigger assembly, wherein the release lever comprises a first release lever and a second release lever;
The tops of the first release rod and the second release rod are respectively fixed at two ends of the cross beam through nuts, and the bottoms of the release rods are fixed with the time constant testing cavity;
the trigger assembly is arranged on the fixed part and is used for supporting the cross beam so as to keep the cross beam and the fixed part relatively static;
the button is connected with the fixed part through a spring, and a control groove for controlling the trigger is arranged on the button;
The middle part of the trigger is connected with the fixed part through a rotating shaft, one end of the trigger is positioned in the control groove, and the other end of the trigger is provided with a release hook for supporting the cross beam;
The button is pressed to enable the control groove to drive one end of the trigger to rotate around the rotating shaft, and the release hook at the other end of the trigger is contracted to release the cross beam;
One end of the trigger is driven by the control groove to rotate around the rotating shaft by releasing the button, and the release hook at the other end of the trigger is sprung outwards to erect the cross beam.
2. The humidity sensor testing device of claim 1 wherein the stationary component comprises a center rod and a control head;
the bottom end of the central rod is fixed with the partition plate, and the control head is fixed at the top end of the central rod;
the control head is provided with a button groove, and the button is positioned in the button groove;
The trigger is positioned in the trigger groove, and the release hook can be sprung or contracted outside the opening.
3. The humidity sensor testing device of claim 2 wherein the cross beam is provided with a through hole through which the center rod passes.
4. The humidity sensor testing device of claim 1 wherein the separator is provided with a thermal insulation layer.
5. The humidity sensor testing device of claim 4 wherein the upper surface of the insulating layer is provided with a cushion pad.
6. The humidity sensor testing device of claim 4 wherein the heat preservation layer is polytetrafluoroethylene material.
7. The humidity sensor testing device according to claim 1, wherein the time constant testing cavity is a cavity structure with an upper opening, and a sealing ring is arranged at the upper opening of the time constant testing cavity and is made of silicone rubber.
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| CN202111131775.9A CN113687034B (en) | 2021-09-26 | 2021-09-26 | Humidity sensor's testing arrangement |
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| CN202111131775.9A CN113687034B (en) | 2021-09-26 | 2021-09-26 | Humidity sensor's testing arrangement |
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| CN113687034B true CN113687034B (en) | 2025-10-31 |
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| KR101508558B1 (en) * | 2014-07-18 | 2015-04-16 | 한국표준과학연구원 | Dual Cap Protecting Humidity Sensors of Radiosondes |
| CN105136979A (en) * | 2015-07-17 | 2015-12-09 | 香河国瑞智测试设备有限公司 | Humidity sensor time constant testing device |
| CN106289328B (en) * | 2016-08-16 | 2018-07-27 | 广州卓振智能科技有限公司 | A kind of temperature and humidity value measures compensation method and system |
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